Silver Brush's Ruby Satin Interlon Hair brushes have an interlocked construction and inward curve allowing for superb control of each stroke. The hair is finer than hog bristle but just as firm, allowing strong strokes with excellent resilience. Ruby Satin stands up better on textured surfaces than bristle and lesser quality synthetics. They shape beautifully for flawless strokes. All brushes are handmade and set in nickel plated solid brass ferrules attached to deep green, lacquered, long wood handles with silver tips.